获取所有行政区划代码的最高级，用于sql的like查询

    /**
     * 获取所有行政区划代码的最高级 用于sql的like查询
     * @param regionCodeLevels
     * @return
     */
    public static List<String> getAllFirstRegionCode(String regionCodeLevels){
        List<String> regionCodeList = new ArrayList<>();
        LinkedHashSet<String> regionCodeLinkList = new LinkedHashSet<>();//自动去重
        if(StringUtils.isNotEmpty(regionCodeLevels)){
            String[] regionLevelArrays = regionCodeLevels.split(",");
            for (String regionLevels:regionLevelArrays) {
                String[] regionLevelArray = regionLevels.split("_");
                String reginCode = regionLevelArray[0];
                String regionLevel = regionLevelArray[1];
                switch (regionLevel){
                    case "1":{
                        regionCodeLinkList.add(reginCode.substring(0,2));//35%
                        break;
                    }
                    case "2":{
                        String proveCode = reginCode.substring(0,2);
                        List<String> proveList = regionCodeLinkList.stream().filter(d->d.equals(proveCode)).collect(Collectors.toList());
                        if(proveList != null && proveList.size()>0){ //如果已经存在上一级则跳过添加
                            continue;
                        }else {
                            regionCodeLinkList.add(reginCode.substring(0,4));//3501%
                        }
                        break;
                    }
                    case "3":{
                        String proveCode = reginCode.substring(0,2);
                        List<String> proveList = regionCodeLinkList.stream().filter(d->d.equals(proveCode)).collect(Collectors.toList());
                        String cityCode = reginCode.substring(0,4);
                        List<String> cityList = regionCodeLinkList.stream().filter(d->d.equals(cityCode)).collect(Collectors.toList());
                        if((cityList != null && cityList.size()>0) || (proveList != null && proveList.size()>0)){ //如果已经存在上一级、上上级则跳过添加
                            continue;
                        }else {
                            regionCodeLinkList.add(reginCode);
                        }
                        break;
                    }
                    default:break;
                }
            }
            for (String str:regionCodeLinkList) {
                regionCodeList.add(str);
            }
        }
        return  regionCodeList;
    }